/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 16 Let \(f(x)=x-1, g(x)=\sqrt{x+1}\... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

Let \(f(x)=x-1, g(x)=\sqrt{x+1}\), and \(h(x)=2 x^{3}-1\). Find the rule for each function. \(\frac{f h}{g}\)

Short Answer

Expert verified
The rule for the function \(\frac{fh}{g}\) is: \(\frac{(x - 1)(2x^3 - 1)}{\sqrt{x + 1}}\).

Step by step solution

01

Identifying and writing down the given functions

We are given the following functions \(f(x)\), \(g(x)\), and \(h(x)\): 1. \(f(x) = x - 1\) 2. \(g(x) = \sqrt{x + 1}\) 3. \(h(x) = 2x^3 - 1\)
02

Combining the functions as requested

We need to find the rule for the function \(\frac{f h}{g}\). We will first find the product of functions \(f(x)\) and \(h(x)\) and then find the quotient with \(g(x)\): 1. The product of functions \(f(x) \cdot h(x)\) can be calculated as follows: \(f(x) \cdot h(x) = (x - 1)(2x^3 - 1) \) 2. To find the rule for \(\frac{fh}{g}\), we need to divide the product we found in step 1 by the function \(g(x)\): \(\frac{(x - 1)(2x^3 - 1)}{\sqrt{x + 1}}\)
03

Finalizing the result

Finally, the rule for the function \(\frac{fh}{g}\) is: \(\frac{f h}{g} = \frac{(x - 1)(2x^3 - 1)}{\sqrt{x + 1}}\)

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91Ó°ÊÓ!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Algebraic Functions
Algebraic functions are the basic building blocks of mathematical modeling in elementary algebra. These functions consist of constants and variables, combined using algebraic operations such as addition, subtraction, multiplication, division, and exponentiation. In simpler terms, these functions are formulated using polynomial expressions and other common operations.

For instance, consider the algebraic function \(f(x) = x - 1\). Here, the function subtracts 1 from the variable \(x\). Similarly, \(h(x) = 2x^3 - 1\) takes a more complex form by including a cube of the variable, making it a cubic algebraic function.

These functions often describe real-world phenomena by representing various relationships between quantities. Understanding algebraic functions is fundamental, as they form the basis for manipulating quantities in algebra-related fields.
Function Composition
Function composition involves taking two or more functions and combining them to form a new function. This is achieved by applying one function to the results of another. In mathematical terms, the composition of functions \(f\) and \(g\) is written as \((f \circ g)(x)\) or \(f(g(x))\).

For example, if \(f(x) = x - 1\) and \(g(x) = \sqrt{x + 1}\), their composition is \(f(g(x)) = f(\sqrt{x + 1}) = \sqrt{x + 1} - 1\). Here, we applied function \(g(x)\) and then function \(f(x)\) to form a composite function.

Function composition allows complex scenarios and behaviors to be modeled by breaking them down into simpler functions. It's a powerful tool in algebra that connects and manipulates functions into a single, cohesive expression.
Quotient of Functions
The quotient of functions refers to the division of one function by another. This operation creates a new function by finding the ratio between the two original functions. If you have two functions \(f(x)\) and \(g(x)\), their quotient is depicted as \(\frac{f(x)}{g(x)}\).

In our exercise, we were tasked with finding \(\frac{fh}{g}\), which involves the following steps:
  • First, calculate the product \(fh\), where \(f(x) = x - 1\) and \(h(x) = 2x^3 - 1\), leading to \((x - 1)(2x^3 - 1)\).
  • Next, divide this product by \(g(x) = \sqrt{x + 1}\), resulting in \(\frac{(x - 1)(2x^3 - 1)}{\sqrt{x + 1}}\).
This operation allows for more complex relationships to be expressed as a single function, representing how different values depend on each other through division. It's crucial for solving real-world problems that require determining how one quantity changes in relation to another.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

In 2005, National Textile installed a new machine in one of its factories at a cost of \(\$ 250,000\). The machine is depreciated linearly over 10 yr with a scrap value of \(\$ 10,000\). a. Find an expression for the machine's book value in the \(t\) th year of use \((0 \leq t \leq 10)\). b. Sketch the graph of the function of part (a). c. Find the machine's book value in 2009 . d. Find the rate at which the machine is being depreciated.

BREAK-EvEN ANALYsIS A division of Carter Enterprises produces "Personal Income Tax" diaries. Each diary sells for \(\$ 8\). The monthly fixed costs incurred by the division are \(\$ 25,000\), and the variable cost of producing each diary is \(\$ 3\). a. Find the break-even point for the division. b. What should be the level of sales in order for the division to realize a \(15 \%\) profit over the cost of making the

Find the vertex, the \(x\) -intercepts (if any), and sketch the parabola. \(f(x)=\frac{3}{8} x^{2}-2 x+2\)

The deaths of children less than 1 yr old per 1000 live births is modeled by the function $$ R(t)=162.8 t^{-3.025} \quad(1 \leq t \leq 3) $$ where \(t\) is measured in 50 -yr intervals, with \(t=1\) corresponding to 1900 . a. Find \(R(1), R(2)\), and \(R(3)\) and use your result to sketch the graph of the function \(R\) over the domain \([1,3]\). b. What was the infant mortality rate in \(1900 ?\) In \(1950 ?\) In \(2000 ?\)

In Exercises 19-24, find the points of intersection of the graphs of the functions. \(f(x)=-x^{2}+4 ; g(x)=x+2\)

See all solutions

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.